Gas burner construction



April 20, 1965 R. w. sARGENT GAS BURNER CONSTRUCTION Filed Oct. 30, 1962 Raymond W Sargenr IN VENTOR.

United States Patent O 3,179,154 GAS BURNER CNSTRUCTION Raymond W. Sargent, Burlingtou, Vt. (222 Martling Ave., Tarrytown, NX.) Filed Oct. 30, 1962, Ser. No. 234,078 Claims. (Cl. 158-99) This invention relates to burners for gaseous fuels.

It is a primary object of the present invention, to provide a gas burner construction providing noise-free operation, eliminating flash-back, affording immediate ignition, Operating at a relatively cool burner body temperature and producing a constant uniformly distributed flame.

Another object of the present invention is to provide a gas burner construction having the aforementioned attributes yet capable of being fabricated with great economy.

An additional object of the present invention is to pro- `vide a gas burner body construction made of sheet material having embossed surfaces so as to provide a plurality of restricted but continuous bafiling passage ports operative to produce constant flame heights when supplied with a fuel mixture from a tube portion of the burner body essentially uniform in cross-sectional area.

A still further object of the present invention provides an economical gas burner body construction as hereinbefore indicated having facilities for accurately adjusting the supply of primary air by a minimum of effort.

Another object of the present invention is to provide a gas burner construction associated with a fabricating procedure whereby the gas burner may be produced in an extremely economical manner.

These together with other objects and advantages which will become subsequently apparent reside in the i details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

FIGURE 1 is a side elevational view of the gas burner construction with parts broken away.

FIGURE 2 is a front end view of the gas burner as viewed from a plane indicated by section line 2-2 in FIGURE 1. i

FIGURE 3 is a transverse sectional view taken substantially through a plane indicated by section line 3-3 of FIGURE 1.

FIGURE 4 is a transverse sectional view taken substantially through a plane indicated by section line 4-4 in FIGURE 1.

Referring now to the drawings in detail, it will be observed that the gas burner construction of the present invention generally referred to by reference numeral 10, includes a burner body generally referred to by reference numeral 12 which is connected to and supported by a supporting platemember 14 at any desired location. A fuel nozzle 16 of any suitable type, suppliesfuel under pressure into the burner body 12 at a relatively high Velocity, said nozzle being supplied with fuel by a supply conduit 18. Accordingly, the fuel nozzle 16 is mounted in proper relation to the burner body 12 by `means of an air shutter plate 20 adjustably spaced from the burner body 12 for controlling the supply of combustion supporting fluid or air thereto in order to produce the proper combustible mixture. Shutter adjustment means generally referred to by reference numeral 22 is therefore provided in order to adjustably space the burner body 12 from the shutterplate 20.

The burner body 12 is made from a rectangular blank of sheet metal the inner wall surfaces of which is embossed so as to form a plurality of protrusions 24. The rectangular blank of sheet metal is therefore folded into a cross-sectional configuration including a pair of Vertical, abutting longitudinal wall poitions 26 and 28 which are spaced from each other by the embossed protrusions 24 so as to form therebetween a plurality of angled discharge passage ports 30. The passage ports 30 therefore provide restricted and bafiied discharge of the fuelmixture along a predetermined length of the burner body between the upper longitudinal edges of the Vertical Wall portions. The fuel mixture is therefore distributed to the discharge passages 30 by a supply passage formed by the tubular duct portion 32 of the burner body, which supply passage is disposed in non-perpendicular relation to the angled passages 39 formed between the longitudinal edge portions 26 and 28.

The end 34 of the burner body remote from the fuel supply nozzle 16, is closed by being gas-tight welded to the supporting plate member 14. Also, it will be observed from FIGURE 4 in particular, that the section of the tubular portion 32 disposed below the ported portions of the longitudinal edgeportions 26 and 28, is polygonal in cross section. Thus, the exemplary crosssectional Shape is approximately triangular being defined by the downwardly converging side walls 36 and 38 connected to each other at the bottom and interconnected with the longitudinal wall portions 26 and 28 by the downwardly diverging wall portions 40 and 42. The entire burner body is bent in this manner initially with the end 34 thereof being welded to the supporting plate member while a fixed length of the edge portions 26 and 28 extending from the inlet end 44 opposite the end 34, being spot welded to a channel guide member 46 by spot welds 48 after the underlying portions have been arc welded as indicated at 50 in FIGURE 3 in order to seal an inlet section 52 of the gas burner body 12 wherein fuel gas and combustion supporting air is mixed. It will be furthermore observed, from FIGURE 3 in particular, that the inlet end 44 which is circular in crosssection, is connected by the inlet section 52 to the tubular portion 32. Accordingly, the cross-sectional shape to which the body member 12 is initially bent, may be deformed at the inlet end by means of a conical or tapered mandrel so as to form the circular inlet end from the initial cross-section; It will therefore be apparent, that the Variation in the cross-sectional Shape of the gas burner body member 12 from the circular inlet end 44 to the polygonal cross-section of the tubular portion 32 produces a geometrical reduction in the cross-sectional area along the transitional inlet section 52 in the direction of flow of gas inasmuch as the area enclosed by a circular perimeter is greater than any area enclosed by a polygon having the same perimetrical length. Also, by virtue of the circular cross-sectional shape of the inlet end 44, the shutter plate 20 may mount the fuel nozzle 16 concentrically with respect to the inlet end in order to provide a uniform flow of primary air thereabout.

The fiow rate of primary air providing the proper fuel mixture may be readily regulated by varying the spacing between the inlet end 44 and the shutter plate 20. Accordingly, the adjustment device 22 includes a channel slide member 54 within which the channel guide member 46 is slidably received so that the entire burner body 12 may be displaced with respect to the shutter plate member 20 in order to vary the spacing 58. The guide member 54 is therefore welded to an upwardly `projecting portionof the shutter plate member 20 and is also provided with a setscrew element 56 in 'order to lock the body 12 in axially adjusted position with respect to'the shutter plate member 20. i

awansie From the foregoing description, the construction, operation and utility of the gas burner of the present invention will be apparent. It will be noted from the foregoing description, that the cross-sectional area throughout the length of the burner body 12 is constant except for the transitional inlet section, yet under actual test conditions, the h'eight of the fiarne projecting from the exposed longitudinal edge portions 26 and 28, remains constant. It is belieyed that the foregoing phenomena results from the non-perpendicular relationship between the restricted passages '30 to the supply passage of the tubular portion 32. Also, the use of embossed sheet material With the diamond-shaped protrusions 24, constitutes an -econornical method for lforming the referred to restricted passages 3h as a result of which there is less severe directional changes in the fiow of the higher velocity gases present at the inlet end of the tubular portion 32 so as to reduce turbulence that Would otherwise occur. The uniformity and consistency of the fiame produced by 'the burner construction of the present invention may thereby be explained. Also, it will be apparent that the constructional vprinciples involves a significant reduction in height and width of the burner body so as to more readily satisfy installational requirements. In addition to the foregoing, a simple, yet accurate adjustment is provided for controlling the amount of primary air in order to maintain a proper fiow of fu'el mixture.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skill-ed in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.

What is clairned as new is as follows:

1. A gas burner comprising, an elongated fiow passage member having parallel longitudinal edge portions abutting each other and defining therebelow a tubular portion of constant flow area connected to a transitional mixing section of varying flow area having an inlet end, said longitudinal edge portions being spaced by projecting protrusions to form a plurality of restricted discharge passage ports disposed in non-perpendicular relation along said tubular portion, means closing one end of said tubu- 'lar portion, nozzle means projecting into said inlet end of the mixing section oppositeV said one end for supply of fuel to the tubular portion, and shutter means mounted on said longitudinal edge portions in spaced relation to said inlet end for supply of combustion supporting fluid to said `transitional mixing section of the passage member.

2. A gas burner comprising, an elongated fiow passage member having parallel longitudinal edge portions abutting each other and defining therebelow a tubular portion of constant fiow area connected to a transitional mixing section of varying fiow area having an inlet end, said longitudinal edge Vportions being spaced by projecting protru- `sions to form a plurality of restricted discharge passage Vportrs disposed in non-perpendicular relation along said `tubular portion, means closing one end of said tubular portion, nozzle means projecting into said inlet end of the mixng section opposite said one end for supply vof fuel to the tubular portion, and shutter means adjustably spaced from said inlet end for supply of combustion supporting fiuid to said transitional mixing section of the passage member, said shutter means comprising, a shutter plate mounting said nozzle means concentrically with respect to said inlet end in adjustably spaced relation thereto, guide means connected to a fixed length of said longitudinal edge portions sealing said mixing section to prevent dscharge of fiuid therefrom, and slide means fixed to said shutter plate and slidably mounted on said guide means to adjustably space said shutter plate from the inlet end.

3. The combination of claim 2 wherein said tubular portion is polygonal in cross-section and said inlet end being circular in cross-section.

4. The combination of claim 3, wherein said elongated flow passage member is formed from a rectangular Sheet of material having internally embossed surfaces to form the prostrusions on tlre longitudinal edge portions.

5A The combination of claim l, wherein said tubular portion is polygonal in cross-section and said inlet end being circular in cross-section.

6. The combination of claim 1, wherein said elongated flow passage member is formed from a rectangular sheet of material having internally embossed diamondshaped surfaces to form the protrusons on the longitudinal edge portions.

7. In a gas burner, an elongated fiow passage member having parallel longitudinal edge portions abutting each other and defining therebelow a tubular portion of constant cross-sectional area from which fiuid is discharged, said longitudinal edge portions being spaced by projecting protrusions to form a plurality of restricted discharge passage ports therebetween disposed in non-perpendicular relation to said tubular portion for discharge of said fiuid, said elongated fiow passage member having a constant cross-sectional perimeter and internally embossed diamond-shaped surfaces thereon to form the protrusions on the longitudinal edge portions, said tubular portion being polygonal in cross-section, said flow passage member having an inlet end which is circular in crosssection, and a sealed transition section extending from the inlet end to the polygonal section.

8. A burner body comprising, a thin walled tube inlcluding substantially parallel walls terminating at edges in longitudinally spaced contact With each .other to define port openings, said parallel walls being integrally coni nected by downwardly diverging walls to downwardly converging walls forming a tubular duct, said walls being formed with closely spaced surface embossments throughout, said embossments on the parallel walls respectively abutting each other to form angled passages between the tubular duct and the port openings through which restricted and baffled fiow of fiuid is conducted, means sealing a predetermined length of the parallel walls to form a mixing portion of the tube having an inlet end of maximum cross-sectional area, and shutter means mounted by the sealing means for restrictively admitting fiuid fiow into the tube through said inlet end.

9. A burner body comprising, a thin walled-metal tube including substantially parallel Vertical walls terminating at edges in longitudinally spaced contact with each other to define port openings, said Vertical walls being integrally connected by downwardly diverging -walls -to downwardly converging .walls forming a tubular duct, said walls being formed with closely spaced ,surface embossnients throughout, said embossments on the Vertical walls respectively abutting each other to form angled passages between the tubular duct and the port openings through which restricted and baflled flow of fiuid is conducted, means sealing the edges of said Vertical walls along a predetermined length thereof to define an inletrportion of the tubular duct therebelow communicating with a ported portion of the tubular duct, said inlet portion of the duct terminating in an open end having a cross-sectional area greater than that of the ported portion of thev duct, and shutter means mounted on the sealing means in adjustably spaced relation to said open end of the inlet portion.

10. The combination of claim 9 wherein the crosssectional perimeter of the tubular duct is constant throughout.

References Cted by the Examiner UNITED STATES PAT ENTS 1,09l,663 3/14 Killam 158-117 1,248,565 12/17 Slattery 158-117 (ther references on following page) 5 UNITED STATES PATENTS Anderson et al. 158-99 Reznor 29-157 Ensign et al 158-99 Gercich et al 158-104 X Soun 158-113 Wittman 158-99 6 2,828,532 4/58 Taylor 29-157 2,855,190 10/58 Rieger. v

FOREIGN PATENTS 1,047,300 7/53 France.

JAMES W. WESTHAVER, Primary Examiner. FREDERICK L. MATTESON, IR., Examner. 

1. A GAS BURNER COMPRISING, AN ELONGATED FLOW PASSAGE MEMBER HAVING PARALLEL LONGITUDINAL EDGE PORTIONS ABUTTING EACH OTHER AND DEFINING THEREBELOW A TUBULAR PORTION OF CONSTANT FLOW AREA CONNECTED TO A TRANSITIONAL MIXING SECTION FO VARYING FLOW AREA HAVING AN INLET END, SAID LONGITUDINAL EDGE PORTIONS BEING SPACED BY PROJECTING PROTRUSIONS TO FORM A PLURALITY OF RESTRICTED DISCHARGE PASSAGE PORTS DISPOSED IN NON-PERPENDICULAR RELATION ALONG SAID TUBULAR PORTION, MEANS CLOSING ONE END OF SAID TUBULAR PORTION, NOZZLE MEANS PROJECTING INTO SAID INLET END OF THE MIXING SECTION OPPOSITE SAID ONE END FOR SUPPLY OF FUEL TO THE TUBULAR PORTION, AND SHUTTER MEANS MOUNTED ON SAID LONGITUDINAL EDGE PORTIONS IN SPACED RELATION TO SAID INLET END FOR SUPPLY OF COMBUSTION SUPPORTING FLUID TO SAID TRANSITIONAL MIXING SECTION OF THE PASSAGE MEMBER. 